Clock with striking trains for hours and quarters



T. BAUERLE.

CLOCK WITH STRIKING TRAINS FOR HOURS AND QUARTERS.

APPLICATION FILED NOV. 22, 1920.

,4:37,705. Patented Dec. 5, 1922.

2 SHEETSSHEET I.

T. BAujERLE.

CLOCK WITH STRIKING TRAINS FOR HOURS AND QU'ARTERS.

APPLICATION FILED NOV 22. 1920.

Patented Dec. 5,1922.

2 SHEETS$HEET 2.

Patented Dec. 5, 1922.

' UNITED STATES TOBIAS BAUEBLE, OF ST. GEOBGEN, GERMANY.

CLOCK WITH STBIKING TRAINS FOB HOURS AND QUARTEBS.

I Application-filed November 22, 1920.- Serial No. 425,938.

To all whom it may concern:

Be it known that I ToBIAs Blionnm, a citizen of the German epublic, residing at St. Georgen, Germany, have invented cer- 'tain new and useful Improvements in Clocks with Striking Trains for Hours and paratively complicated and they present further the inconvenience that a rather large driving power-is required for starting the striking train, this starting being accompanied by much noise. v Whilst, owing to the separate releasing devices for the two striking trains, separate step discs for each striking train were required, it has become possible through the present invention to operate both trains from one shaft so that only one step disc is required. From the essential simplification of the whole clockwork there results a. very easy and noiseless working. According to the invention the disc for striking the hours is connected with the disc for striking the quarters mounted upon the same shaft by means of a differential gear which is also mounted on this shaft so that when one striking disc is locked the other strik-' ing disc is driven by the common shaft and vice versa. The alternating looking or stopping of the striking discs is effected through an angle lever which by means of another lever mounted upon the same axle is controlled by the pin disc for the quarters which is mounted directlyupon the minute shaft. I

The adjustment and the releasing of the number of strokes for the hours and quarters is eflected in the well known manner from the minuteor hour-shaft by means of steps and driver with the accessory parts.

In the accompanying drawin s the invention is shown by way of examp e in connection with a Westminster clockwork. Fig. 1 is a front elevation.

Fig. 2 is a plan view of the improved clockwork. I

Fig. 3 is a front elevation, the front plate being removed. I

Fig. 4 shows the differential gear.

Fig. 5 represents in a diagrammatic view the escapement for the striking train.

Fig. 6 shows a modified construction of the differential gear.

The improved clockwork comprises two separate driving shafts l, 2 with rope drums 3, 4, the first of which is designed for operating the clockwork, the second one being designed for operating the striking train. At the side of the drum 4 a toothed wheel 5 is loosely mounted which is connected in the well known manner through a spring influenced pawl 6 with the counter ratchet wheel 7 of the drum 4. The toothed wheel 5 operates through the intermediary of a wheel 8 the shaft 9 which carries the differential gear. A wheel 10 mounted upon the A wheel 19 mounted upon the same axle as wheel 18 engages with the inner teeth of a toothed crown 20 loosely mounted upon the shaft 9, said toothed wheel 20 serving as striking disc for the quarters and being connected through the wheels 21, 22 with the musical cylinder 23 which in the well known manner operates through its pins 24 the hammer levers 25. The striking disc 17 for the hours acts in the well known mannerby-means of the lever 26 upon the arm 27 for striking the hours which in the form of construction shown by way of example lifts simultaneously four hammers 25 for striking.

A smooth rimmed disc 29 with notches 28 is connected with the striking disc 20 for the quarters. The nose of a lever 30 slides upon the smooth rim of said disc 29, said lever 30 being keyed, together with the lever 31, upon a common axle 50, said lever '31 reachlng with its bevelled end into the path of the striking disc 17 and locking said disc as long as the lever 30 slidesv upon the rim of the disc 29. As soon as the nose of the the minute shaft 33, said pin-disc 34 haying three short pins 35 and a long pin 36. Only the long pin 36 serves for liftingfthe lever 32 whereby the nose of the lever 30 is withdrawnfroin the notch of the disc 39 so that said disc is released, the striking disc for the hours being simultaneously stopped through the disc 31. Upon the hollow shaft for the hours the stepped disc 37 is mounted this detent the snail 42 whereby the curb which presents the steps for the hours and the intermediary smaller steps for the quar-' ter, the half hour and three-quarter hour, said intermediary steps being arrangedon a lower plane than the hour steps. This stepped'disc serves for limiting the descent of the lever 38 infiuenced'by the spring 54;

and of the curb 39 rigidly connected with said lever 38.

The release and the movement of the curb is effected in the well'known manner from shaft 11 through the intermediary of the de tent 40, ratch 41 and snail 42. The detent' dl is lifted through its lever arm 43 from the studs 35, 36 of the quarter disc 34.

The depth of the different quarter steps and hoursteps of the step disc 37 is calculated so that, when the lever 39 drops upon one of said steps, the curb 39 is moved for a number of teeth which corresponds with the number of the quarter hours and hours to be struck. l or striking half an hour for example the curb descends for two teeth, and it drops for 12 teeth for striking eight oclock, i -Yithin one hour the work has to strike ten quarter strokes upon which follow the hour strokes, that is to say after every tenth quarter stroke the disc 29 with the quarter d T to be stopped, whereby the hour die: F F .released whilst, before the first quarterstroke of each hour, the stopping of the quarter disc has to be inter rupted the hour disc having to be stopped.

This is effected in the following 1nanner:

After the hour has been struck, the disc 29 remains still stopped through the nose of the lever 30. Shortl before the first quarter stroke the long pin36 of the quarter disc lifts the lever arm 43 of the detent 40 and through 39 is released so that the lever 38 drops upon the first quarter step, the curb being rotated for the length of one tooth. At the same time the long pin 36 lifts also the lever 32 whereby the lever 30 is made to release the disc 29, the hour disc being simultane- N ously looked through the second lever 31. The work is now ready for the first quarter stroke. This is struck after the pin 36 has passed: under the lever arm 43 of the detent whereupon this lever arm descends and the dtent releases in the well known manner the gear through the catch M. The lever 32 remainsraised so that the quarter-strik ing disc can revolve. At the following strokes for'the halfhour," for the three quarterjhour and for the four strokes for the. full] hour the same operation takes place with the exception that thelever 32 is not lifted any moreby the three shorter pins 35,, this bein no longer necessary as after the first quarter stroke the nose of the lever 30 can slide upon the smooth rim of the disc 29. After the four, strokes before the hour have been struck, that is to say after the tenthquarteristroke, the disc 29 has completed'one revolution and the nose of the lever 30 dr'ops into the notch 28 of the disc29 as the lever 32 is not raised through the fourth pin (a short pin) the disc 29 being thus stopped and'the hour disc being released, throughlever so that the hour strokes can be struck The play begins again after the hour has 95 beenfcompletel'y struck. As. the striking train requiresmore driving power than the clockwork, a wheel l8floosely mounted at theside of the rope drum" 3 and coupled t ough a differential gear 45 with a driv- 1 ingshaft 1 of the clockwork 4:6 is brought inengagem'ent with the loose wheel 5 of the striking train by rneans of a wheel 47. This been done for the purpose to be able to use equal weights for thetwo rope drums 105 3, 4,3 theweight'for the striking train be ing lighter and the weight for the clock,- work being heavier than necessary. In this manner there is obtained that when the striking train begins "to bperate, part of the 1 driving'power of the clockwork is transferred to the driving shaft for the strikingtrain.

The] driving for the clockworkand the striking train can be effected in anyconvenient manner.

Theinventionfl can of course be used for any other clockwork with striking train for hours and quarters.

6 shows a differential change gear for the alternate operation of thestriking train for the hoursor for the quarters in which, instead of the wheels l6, 18, 4-9 and the studs of the toothed crown, bevel wheels 51,152, 53 are used. The operation is exactly the same as hereinbefore described. 2

1; An improved clockworkrwith striking trains for hours" and quarters comprising combination with the usual' clock work an controlling said levers rigidly connected with said axle, a pin disc for the quarters mounted upon the minute shaft of the clockwork 15 for alternately stopping the said two striking discs.

In testimony whereof I afiix my signature. in presence of two witnesses.

TOBIAS BAUERLE. Witnesses FERD. BUTTIGER, HANs BRANS. 

